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Nullify the effect of Trap command in later part of the script


 
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# 1  
Old 07-27-2009
Error Nullify the effect of Trap command in later part of the script

Hi All,

i have an issue regarding trap command.
i have specified trap function in the beginning of the script to catch some signals but in the later part of the script i want to remove the effect of this.
Can anybody help me out of this.

for e.g. pressing Ctrl+C for the first time should be trapped, but the second time Ctrl+C should work as usual.
# 2  
Old 07-27-2009
You could use a trap with no commands (args) (specifying the signals you don't want to trap anymore).

i.e.
Code:
trap "do_something; exit" 1 2 5 9 15 16
.....
trap 2
(or)
trap - 2

Will stop the trap for signal 2

Last edited by Scott; 07-27-2009 at 03:33 PM..
# 3  
Old 07-27-2009
Signals ignored upon entry to the shell cannot be trapped or reset. Trapped signals are reset to their origi-nal values in a child process when it is created.

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